We're all about reverse-engineering popular chips from the 70's and 80's - initially the 6502 but others too. This wiki is for documenting our findings and recording our sources, and is of course a work in progress.

The online help for our JavaScript simulator is also here, to help you get the most from that. (Note that it's only a switch-level simulator - our data also supports more accurate models. For most purposes, there's no difference.) For help on reading the layout, interpreting transistor circuits, and more about digital design, please see the Visual Circuit Tutorial over at NESdev.

MOS 6502 CPU: Our flagship project: we have several pages of findings and many pointers to other resources. We started from photos and now have a full transistor level netlist with transistor sizes, and of course our in-browser simulator.

Atari ANTIC: layout is in the process of polygon capture or netlist extraction.Primary data not yet published, but see thesethreads.

Zilog Z80 CPU: We have photographs of the metal layer, and have started capturing the polygons. No public information yet.

Motorola 68000: We have photographs of the metal layer, and have started capturing the polygons.The project page contains die photo and shows areas being captured. This chip will need further deprocessing and photography for the lower layers.